Method for planting water shields through reservoir waterside fish returning to field

Abstract

The invention discloses a method for planting water shields through reservoir waterside fish returning to a field. The method comprises the steps of 1 water shield field modification, wherein a fishpond is modified into a flat-bottomed water shield field with the depth of 1 m, a pump station is built, water irrigation and drainage are separated, a canal system is adopted cooperatively, and reservoir clean water is recycled; 2 water shield field fertilization, wherein enough fertilizer is applied before water field transplanting and germination in spring; 3 field disinfection and clearing, wherein weeds, snails, fungi, spirogyra and other pests are removed; 4 season selection transplanting, wherein planting can be performed all the year round, and preferably, transplanting is performed before germination in spring; 5 timely harvesting, wherein water shield leaves basically and fully cover the water surface, and harvesting is performed every 5-10 days; 6 water shield field management, wherein the water level quality is controlled, and prevention and removal of pests are well performed.

Description

technical field [0001] The invention relates to a planting method of water shield, in particular to a planting method of returning fish to the water surface of a reservoir and returning water shield. [0002] technical background [0003] Water shield is a perennial herbaceous aquatic vegetable with shrunken roots. The optimum temperature for growth is 20-30°C. It grows slowly when the water surface temperature reaches 40°C, and gradually stops growing when the temperature is lower than 15°C. In case of frost, the leaves and some stems in the water will die. The remaining stems survive the winter in the water; they like to grow in the shoals with a water depth of about 30-60cm in rivers and lakes, and it is not suitable for growth if it exceeds 100cm; the water level requires relatively stable water flow, and the water environment is rich in oxygen. Since the Song Dynasty, with the increase of the population, the imperial court encouraged the construction of lake fields, the ...

AI Technical Summary

Problems solved by technology

[0012] 1. Unstable water sources: clean water sources with pollution-free visibility above 40cm are difficult to stabilize, and ordinary river water and lake water cannot be directly irrigated, thus restricting the planting of water shield;

[0013] 2. Easy to grow algae: There is no clean water source for direct irrigation in the water shield field, and the water must be clarified and up to the standard before it can be used. It is difficult to increase the oxygen and change the water in time with the dynamic water flow in the water shield field, so it is easy to grow Spirogyra and even cyanobacteria. Unfavorable for the growth of water shield;

[0014] 3. Occupation of cultivated land: water shield competes with grain and oil for farmland, and limited cultivated land also restricts the development of water shield